Johnson, Inc. had the following inventory data: Inventory item T25 had 1,600 units at a unit price of $14 in inventory on January 1. The first purchase during the year was for 1,000 units at $15. The second purchase was for 1,000 units at $18. The December 31 inventory consisted of 1,200 units. The market price is $15.

The weighted average unit price is

a. $14.50.

b. $15.39.

c. $15.67. 

d. $16.00.